Instruction Manual
TOOLS AND SUPPLIES NEEDED
• Medium C/A glue
• 30 minute epoxy
• 6 minute epoxy
• Hand or electric drill
• Assorted drill bits
• Modeling knife
• Straight edge ruler
SUGGESTION
To avoid scratching your new airplane, do not unwrap
the pieces until they are needed for assembly. Cover
your workbench with an old towel or brown paper,
both to protect the aircraft and to protect the table.
Keep a couple of jars or bowls handy to hold the
small parts after you open the bag.
NOTE:
1. Please trial fit all the parts. Make sure you have
2. The painted and plastic parts used in this kit are
PREPARATIONS
Remove the tape and separate the ailerons
from the wing and the elevators from the stab.
Use a covering iron with a covering sock on
high heat to tighten the covering if necessary.
Apply pressure over sheeted areas to
thoroughly bond the covering to the wood.
I n s t r u c t i o n M a n u a l
GRIPEN
EDF 90MM ARF SCALE 1:7
SPECIFICATION
- Wingspan: 1084mm (42.7 in)
- Length: 1655mm (65.1 in)
- Flying weight: 5.9 - 6.1 kg
- Wing area: 42dm2
- Wing loading: 140g/dm2
- Wing type: Naca airfoils
- Retract gear type: Mechanic retract gear
with CNC Suspension Metal Struts (included)
- Radio: 6 - 9 channel . 6 mini hi-torque servo:
2 aileron; 2 flap; 1 rudder; 1 steering nose;
2 standard hi-torque servo (minimum 9kg)
for 2 elevator; 3 servo retract Futaba S3170G
(not included)
- Engine: edf 90mm ; 10-12 cells (not included)
- Gravity CG: 95-100 mm (3,7- 3,9 in) Back from
the leading edge of the wing, at the fuselage
- Control throw Ailerons: Low: 8mm up/down,
10% expo; High: 10mm up/down, 10% expo
- Control throw Elevators: Low: 11mm up/down,
12% expo; High: 13mm up/down, 12% expo
- Control throw Rudder: Low: 15mm right/left,
15% expo; High: 20mm right/left, 15% expo
- Control throw flap : Mid : 15mm down;
Landing : 20mm down
- Plane type: scale military
- Experience level: advanced
RECOMMENDED EDF AND BATTERY SET UP
- EDF: 90mm, Midi-Fan evo/ HET 650-68-1130
WeMoTec (not included)
- Lipo cell: 10-12 cells / 5000mAh 60C
(not included)
- Esc 120-160 A Phoenix Castle (not included)
2
GRIPEN 90MM
Instruction Manual
TOOLS AND SUPPLIES NEEDED
• Medium C/A glue
• 30 minute epoxy
• 6 minute epoxy
• Hand or electric drill
• Assorted drill bits
• Modeling knife
• Straight edge ruler
SUGGESTION
To avoid scratching your new airplane, do not unwrap
the pieces until they are needed for assembly. Cover
your workbench with an old towel or brown paper,
both to protect the aircraft and to protect the table.
Keep a couple of jars or bowls handy to hold the
small parts after you open the bag.
NOTE:
1. Please trial fit all the parts. Make sure you have
the correct parts and that they fit and are aligned
properly before gluing! This will assure proper
assembly. The GRIPEN EDF 90MM ARF
SCALE 1:7 is hand made from natural materials,
every plane is unique and minor adjustments
may have to be made. However, you should find
the fit superior and assembly simple.
2. The painted and plastic parts used in this kit are
fuel proof. However, they are not tolerant of many
harsh chemicals including the following: paint
thinner, C/A glue accelerator, C/A glue debonder
and acetone. Do not let these chemicals come in
contact with the colors on the covering and the
plastic parts.
1
• 2 bender plier
• Wire cutters
• Masking tape
• Thread lock
• Paper towels
• Rubbing alcohol
PREPARATIONS
Remove the tape and separate the ailerons
from the wing and the elevators from the stab.
Use a covering iron with a covering sock on
high heat to tighten the covering if necessary.
Apply pressure over sheeted areas to
thoroughly bond the covering to the wood.
INSTALLING THE AILERONS
1. Test fit the ailerons to the wing with the hinges.
If the hinges don’t remain centered, stick a pin
through the middle of the hinge to hold it in
position.
TEMPORARY PIN
TO KEEP HINGE
CENTERED
2. Apply six drops of thin CA to the top and bottom
of each hinge. Do not use CA accelerator. After
the CA has fully hardened, test the hinges by
pulling on the aileron.
C.A glue
1
Remove the covering
3
INSTALLING THE AILERON SERVOS
1. Install the rubber grommets and brass eyelets
onto the aileron servo.
2. Using a modeling knife, remove the covering
from over the pre-cut servo arm exit hole on the
aileron servo tray / hatch. This hole will allow
the servo arm to pass through when installing
the aileron pushrods.
Instruction Manual
3. Place the servo into the servo tray. Center the
4. Using the thread as a guide and using masking
5. Place the aileron servo tray / hatch into the
6. Repeat step # 2 - # 5 to install the second
GRIPEN 90MM
Instruction Manual
7
To the cowl
2
3. Place the servo into the servo tray. Center the
servo within the tray and drill 1,6mm pilot holes
through the block of wood for each of the four
mounting screws provided with the servo.
4
4. Using the thread as a guide and using masking
tape, tape the servo lead to the end of the
thread: carefully pull the thread out. When you
have pulled the servo lead out, remove the
masking tape and the servo lead from the
thread.
Servo lead
Servo lead
5
5. Place the aileron servo tray / hatch into the
servo box on the bottom of the wing and drill
pilot holes through the tray and the servo box
for each of the four mounting screws. Secure
the servo tray in place using the mounting
screws provided ( 2mm x 12mm ).
6. Repeat step # 2 - # 5 to install the second
aileron servo in the opposite wing half.
INSTALLING THE CONTROL HORNS
1. Remove the covering from the slot on the
bottom of the aileron.
2. Insert the control horn into the slot and secure it
by using C.A glue.
6
To the cowl
8
Remove the covering
9
3. Repeat step # 1 - # 2 to install the control horn
on the opposite aileron.
C.A glue
control
Instruction Manual
INSTALLING THE AILERON LINKAGES
1. Working with the aileron linkage for now, thread
2. Attach the clevis to the outer hole in the control
3. Locate one nylon servo arm, and using wire
INSTALLING THE CONTROL HORNS for flap
Repeat step #1 - #3 from installing the control
GRIPEN 90MM
Instruction Manual
3
INSTALLING THE AILERON LINKAGES
1. Working with the aileron linkage for now, thread
one clevis at least 14 turns onto one of the
threaded wires.
INSTALLING THE MAIN RETRACT LANDING
GEAR
1. Install the servo retract to the fuselage as photo below.
8. Insert the 90 degree bend down through the
hole in the servo arm. Install one nylon snap
keeper over the wire to secure it to the arm.
Install the servo arm retaining screw and
remove the masking tape from the aileron.
9. Repeat step # 4 - # 8 to install the second
aileron linkage. After both linkages are
completed, connect both of the aileron servo
leads using a Y-harness you have purchased
separately.
Silicone Tube
13
10
11
2. Attach the clevis to the outer hole in the control
horn. Install a silicone tube on the clevis.
3. Locate one nylon servo arm, and using wire
cutters, remove all but one of the arms. Using a
2mm drill bit, enlarge the third hole out from the
center of the arm to accommodate the aileron
pushrod wire.
4. Plug the aileron servo into the receiver and
center the servo. Install the servo arm onto the
servo. The servo arm should be perpendicular
to the servo and point toward the middle of the
wing.
5. Center the aileron and hold it in place using a
couple of pieces of masking tape.
6. With the aileron and aileron servo centered,
carefully place a mark on the aileron pushrod
wire where it crosses the hole in the servo arm.
7. Using pliers, carefully make a 90 degree bend
down at the mark made. Cut off the excess
wire, leaving about 4mm beyond the bend.
12
INSTALLING THE CONTROL HORNS for flap
Repeat step #1 - #3 from installing the control
horn for aileron to install the control horn for
flap.
INSTALLING THE flap LINKAGE
Repeat step #1 - #9 from installing the aileron
linkage to install the flap linkage.
14
Instruction Manual
SECURE THE WING TO THE FUSELAGE
INSTALLING THE MAIN RETRACT LANDING
GEAR
1. Install the servo retract to the fuselage as photo below.
INSTALLING THE NOSE gear Retract
1. Trim the plastic wheel well.
2. Install the adjustable servo connector to the
servo arm of the servo retract gear.
3. Secure the main retract to the mounting of
landing area.
4. Connect the metal rod of retract gear to the
servo connector.
6. Lock-up the axle.
5. Secure the wheel.
Instruction Manual
18
Servo retract
19
Screw
20
Connector
21
Screw
GRIPEN 90MM
Instruction Manual
4
SECURE THE WING TO THE FUSELAGE
15
16
17
Joiner
Screw here.
12mm
INSTALLING THE NOSE gear Retract
1. Trim the plastic wheel well.
6. Lock-up the axle.
GRIPEN 90MM
Instruction Manual
23
Remove the plastic
C.A glue
24
2. Glue the wheel well by C.A glue.
3. Install the servo retract.
22
Screw
5
Instruction Manual
Servo arm
Wheel
Adjustable servo
connector
Metal rod
Control horn
Retract
Servo arm
Metal rod
Wheel
Adjustable servo connector
Control horn
Retract
Gear
Gear close
Gear Open
4. Install the adjustable servo connector to the
servo arm of the servo retract gear.
5. Install the retract gear to the mounting of nose
6. Connect the metal rod of retract gear to the
7. Secure the wheel.
3. Install the servo retract.
GRIPEN 90MM
Instruction Manual
6
Instruction Manual
25
Servo retract
31
Crimp
30
M3 Clevis
26
27
Connector
28
29
Screw
1. Slide the air inlet to the fuselage.
INSTALLING THE HORIZONTAL STABILIZER
Screw
Screw
4. Install the adjustable servo connector to the
servo arm of the servo retract gear.
5. Install the retract gear to the mounting of nose
gear area.
6. Connect the metal rod of retract gear to the
servo connector.
9. Install the steering nose servo and connect two
cable to the steering nose arm.
10. Connect two cable to the steering nose arm.
11. Install two spring to the steering nose arm as
12mm
8. Lock-up the axle.
GRIPEN 90MM
Instruction Manual
7
32
Spring
1. Slide the air inlet to the fuselage.
33
34
INSTALLING THE HORIZONTAL STABILIZER
Gear close
Gear OPEN
Adjustable servo
connector
Adjustable servo connector
Metal rod
Metal rod
Servo arm
Servo arm
Cable steering nose
Retract
Gear
Cable steering nose
Crimp
Crimp
Steering
nose arm
Steering nose arm
Spring
Spring
Retract
2. Install two elevator servo to the fuselage.
We are hightly recommended using the digital
servo with the torque minimum 9kg.
11. Install two spring to the steering nose arm as
photo below.
4. Secure the servo plate.
3. Install the rudder servo to the servo plate.
INSTALLING THE VERTICAL STABILIZER
1. Repeat these step from the installing aileron for
2. Remove the covering from the servo box.
GRIPEN 90MM
Instruction Manual
8
42
40
Screw
41
Screw
Elevator servo
Clevis M3
Link-ball M3
INSTALLING THE ELEVATOR LINKAGES
38
60mm
4. Make the same way from installing the aileron
linkages for installing the elevator linkges.
1. Metal rod control set.
3. Attach and secure the horizontal stabilizer to
the fuselage using aluminum control horn. Each
control horn secure by 2 screw and using “Loctite”
lock these screw.
5. Make the same way for the second elevator.
Instruction Manual
35
36
37
Remove the covering
C.A glue
3. Remove the covering from the Horizontal
Stabilizer for the elevator dihedral.
4. Insert the carbon tube to the elevator and glue
it by C.A glue.
5. Insert the horizontal to the mounting controller.
39
Screw
2. Secure the metal rod as photo below.
Link-ball M3
Aluminum
control horn
Joiner
50
8. Remove the covering from the rear of the vertical
stabilizer.
Remove the covering
46
49
7. Repeat these step from installing the aileron
linkages to install the rudder linkages.
4. Secure the servo plate.
5. Remove the covering.
48
C.A glue
47
Remove the covering
6. Install and glue the rudder control horn.
45
3. Install the rudder servo to the servo plate.
Screw
Instruction Manual
INSTALLING THE VERTICAL STABILIZER
1. Repeat these step from the installing aileron for
the installing rudder.
43
C.A glue
44
Remove the covering
2. Remove the covering from the servo box.
INSTALLING THE EDF (Electric ducted fan)
system
10. Slide the extension servo lead through the
fuselage. Install the vertical stabilizer and glue it
using epoxy glue.
9. Remove the covering from the rear of the fuselage.
1. Secure the EDF.
GRIPEN 90MM
Instruction Manual
9
GRIPEN 90MM
Instruction Manual
10
8. Trim the plastic inlet lip.
7. Glue the wooden belt for EDF (Included with the
9. Glue the plastic inlet lip using C.A glue.
Instruction Manual
58
C.A glue
3. Slide and fix the air outlet.
4. Secure the air tube to the EDF.
5. Glue the nozzle to the end of the fuselage.
6. Secure the air inlet to the EDF.
55
56
57
INSTALLING THE EDF (Electric ducted fan)
system
2. Trim 1 hole from the air outlet for the wires of EDF.
54
53
Epoxy glue
10. Slide the extension servo lead through the
fuselage. Install the vertical stabilizer and glue it
using epoxy glue.
52
51
Remove the covering
Joiner
Epoxy glue
Servo lead
Remove the covering
Screw
9. Remove the covering from the rear of the fuselage.
C.A glue
1. Secure the EDF.
Instruction Manual
60
59
C.A glue
62
C.A glue
61
64
8. Trim the plastic inlet lip.
63
7. Glue the wooden belt for EDF (Included with the
kit) using C.A glue.
9. Glue the plastic inlet lip using C.A glue.
10. Glue the two plastic part to the fuselage using
C.A glue.
Wooden
belt
OPEN AND CLOSE the canopy
INSTALLING THE ROCKET
65
Open and Close
66
Open and Close
C.A glue
GRIPEN 90MM
Instruction Manual
6. Secure the air inlet to the EDF.
11
GRIPEN 90MM
Instruction Manual
12
INSTALLING THE ROCKET
Instruction Manual
HERE IS OUR SET UP FOR TESTING FLYING
BALANCING
1. It is critical that your airplane be balanced
correctly. Improper balance will cause your
plane to lose control and crash.
THE CENTER OF GRAVITY IS LOCATED
95-100mm BACK FROM THE LEADING EDGE
OF THE WING, AT THE FUSELAGE.
BALANCE A PLANE UPSIDE DOWN WITH
THE FUEL TANK EMPTY.
2. Mount the wing to the fuselage. Using a couple
of pieces of masking tape, place them on the
top side of the wing 95-100mm back from the
leading edge, at the fuselage sides.
3. Turn the airplane upside down. Place your
fingers on the masking tape and carefully lift
the plane.
4. If the nose of the plane falls, the plane is nose
heavy. To correct this first move the battery
pack further back in the fuselage. If this is not
possible or does not correct it, stick small
amounts of lead weight on the fuselage under
the horizontal stabilizer. If the tail of the plane
falls, the plane is tail heavy. To correct this,
move the battery and receiver forward or if this
is not possible, stick weight into the firewall.
When balanced correctly, the airplane should
sit level or slightly nose down when you lift it up
with your fingers.
- Drill four holes 10mm on the air inlet, behind the
ESC for cooling the ESC.
67
Screw
95 -100mm
Lipo-Battery
- EDF: 90mm, Midi-Fan evo/ HET 650-68-1130
WeMoTec (not included)
- Lipo cell: 10-12 cells / 5000mAh 60C (not included)
- Esc 120-160 A Phoenix Castle (not included)
GRIPEN 90MM
Instruction Manual
13
69
HERE IS OUR SET UP FOR TESTING FLYING
68
- Drill four holes 10mm on the air inlet, behind the
ESC for cooling the ESC.
Holes 10mm
ESC
Instruction Manual
Aileron Control
8mm
8mm
Rudder Control
15mm
15mm
Flap Control
15mm
Elevator Control
11mm
11mm
LATERAL BALANCE
After you have balanced a plane on the C.G.
You should laterally balance it. Doing this will
help the airplane track straighter.
1. Turn the airplane upside down. Attach one loop
of heavy string to the engine crankshaft and
one to the tail wheel wire. With the wings level,
carefully lift the airplane by the string. This may
require two people to make it easier.
2. If one side of the wing fall, that side is heavier
than the opposite. Add small amounts of lead
weight to the bottom side of the lighter wing
half's wing tip. Follow this procedure until the
wing stays level when you lift the airplane.
CONTROL THROWS
1. We highly recommend setting up a plane using
the control throws listed.
2. The control throws should be measured at the
widest point of each control surface.
3. Check to be sure the control surfaces move in the
correct directions.
Ailerons : 8mm up 8mm down
Elevator : 11mm up 11mm down
Rudder : 15mm right 15mm left
Flap T/O: 15mm - Landing 20mm
LOW RATE
70
Lipo-Battery
Receiver
To the
nose
71
Receiver-Battery
Nose
Example of connection
- EDF: 90mm, Midi-Fan evo/ HET 650-68-1130
WeMoTec (not included)
- Lipo cell: 10-12 cells / 5000mAh 60C (not included)
- Esc 120-160 A Phoenix Castle (not included)
When ready to fly, first extend the
transmitter aerial.
Switch on the transmitter.
Switch on the receiver.
Check that the wings are correctly
fitted to the fuselage.
GRIPEN 90MM
Instruction Manual
14
FLIGHT PREPARATION PRE FLIGHT CHECK
1. Completely charge your transmitter and receiver
batteries before your first day of flying.
2. Check every bolt and every glue joint in your
plane to ensure that everything is tight and well
bonded.
3. Double check the balance of the airplane
4. Check the control surface
5. Check the receiver antenna. It should be fully
extended and not coiled up inside the fuselage.
6. Properly balance the propeller.
Ailerons : 10mm up 10mm down
Elevator : 13mm up 13mm down
Rudder : 20mm right 20mm left
Hi RATE
BASIC CONNECTION FOR AIRPLANE AND ADJUSTMENT OF SERVOS
FOR YOUR RADIO INSTALLATION
Example of connection
For more information, refer to radio system instruction manual.
Follow instruction manual of Engine and Battery.
Flap Servo
Y-Harness
Y-Harness
Y-Harness
Switch
Receiver
Engine
Throttle Servo
Y-Harness
Battery (Receiver)
Flap Servo
Flap
Flap
Retract Gear Servo
Rudder Servo
Rudder
Main retract
Nose retract
Elevator Servo
Elevator Servo
Elevator
Elevator
Aileron Servo
Aileron Servo
Nose steering
Aileron
Aileron
I/C FLIGHT GUIDELINES
Made in Vietnam
When ready to fly, first extend the
transmitter aerial.
Operate the control sticks on the
transmitter and check that the control
surfaces move freely and in the
CORRECT directions.
ALWAYS land the model INTO the
wind, this ensures that the model lands
at the slowest possible speed.
Switch on the transmitter.
Switch off the transmitter.
Check that the transmitter batteries
have adequate power.
Switch off the receiver.
Switch on the receiver.
ALWAYS take off into the wind.
Check that the wings are correctly
fitted to the fuselage.
If the model does not respond correctly
to the controls, land it as soon as
possible and correct the fault.
Empty the fuel tank after flying, fuel left
in the tank can cause corrosion and
lead to engine problems.
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